6902.20.10 - Bricks

This HTS category, 6902.20.10, specifically encompasses refractory bricks that are primarily composed of alumina (Al2O3), silica (SiO2), or a combination thereof, and contain more than 50 percent by weight of these constituents. These materials are crucial for high-temperature applications, forming the linings of furnaces, kilns, and other industrial equipment where resistance to extreme heat, chemical attack, and thermal shock is paramount. The classification hinges on the chemical composition, ensuring that goods predominantly consisting of these aluminosilicate compounds are accurately identified.

This specific subheading, 6902.20.10, distinguishes itself from its sibling category, 6902.20.50 ("Other"). While 6902.20.50 covers refractory bricks and similar constructional goods that do not meet the >50% alumina or silica threshold, 6902.20.10 is narrowly defined for those with a high concentration of these specific refractory oxides. The intent is to segregate common aluminosilicate refractories from other types of refractory ceramic constructional goods.

Further refinement of this category is provided through its subcategories. The existence of 6902.20.10.10 ("Alumina") and 6902.20.10.20 ("Other") allows for a more granular classification based on the dominant refractory component. Importers and exporters should identify whether the refractory brick is predominantly alumina-based or falls under a broader "other" classification within the >50% alumina/silica group, ensuring precise tariff application.